RAM CHASSIS CAB 2021 Owners Manual
Manufacturer: RAM, Model Year: 2021, Model line: CHASSIS CAB, Model: RAM CHASSIS CAB 2021Pages: 463, PDF Size: 21.5 MB
Page 291 of 463

SAFETY289
Follow the on screen prompts to select the 
number of axles (1 - 3), the number of trailer 
tires (2, 4, 6, 8, or 12), and the set trailer tire 
pressure. The range is selectable anywhere 
between 25-125 psi (172-862 kPa).
Once psi (kPa) is programmed, the pairing 
screen appears. Tire sensors must be paired in 
order shown. Starting with Tire 1, deflate tire by 
5 psi (34 kPa) and wait for a horn chirp. It may 
take up to three minutes for the chirp to occur, 
indicating that the sensor has paired. Repeat 
process on each tire, in order, until complete. 
Do not exit the pairing screen until process is 
complete. If pairing was unsuccessful, a double 
horn chirp will sound, and a prompt on the 
touchscreen will allow you to retry the 
procedure; “Retry” will only appear when setup 
fails. Each tire must be successfully paired 
during a single pairing process to receive the 
success screen.
NOTE:
If the pairing process times out after three 
minutes of no communication with a sensor, a 
double horn chirp will occur indicating the 
pairing has failed and a message will display on 
the radio indicating the process was unsuc -
cessful. Under certain circumstances, the  double horn chirp may continue to happen 
every three minutes indicating the failed 
pairing. If this happens, the horn chirping may 
be canceled by cycling the ignition button OFF 
and then back to ON/RUN position.
Tire Pressure Monitoring System Low Pressure 
Warnings
When a low tire pressure in one or more of the 
active road tires is detected, the instrument 
cluster will display a message stating “Trailer 
Tire Pressure Low”. The instrument cluster will 
then display the TTPMS graphic showing the 
pressure values of each tire with the low tire 
pressure values in a different color.
Should this occur, you should stop as soon as 
possible and inflate the tires with a low pressure 
condition (those in a different color in the 
instrument cluster graphic) to the customer 
programmed target tire pressure value as 
shown at the top of the TTPMS instrument 
cluster graphic. Once the tire(s) are inflated, the 
system will automatically update the graphic 
display in the instrument cluster, returning to its 
original color. The vehicle may need to be driven 
for up to 10 minutes above 15 mph (24 km/h) 
in order for the TTPMS to receive the updated 
information.Service TTPMS Warning
If a system fault is detected, the instrument 
cluster will display a “Trailer Tire Pressure 
System Service Required” message for a 
minimum of five seconds.
Once the system fault is corrected the "Trailer 
Tire Pressure System Service Required" message 
will no longer be displayed. The vehicle may need 
to be driven for up to 10 minutes above 15 mph 
(24 km/h) in order for the TTPMS to receive the 
trailer tire pressure information.
Trailer Tire Pressure System Not Configured
A “Trailer Tire Pressure System Not Configured” 
message will be displayed in the Instrument 
Cluster on the TTPMS instrument cluster 
graphic when a trailer number is selected that 
has not had trailer tire pressure sensors paired  
Ú
page 228.
6
21_DPF_OM_EN_USC_t.book  Page 289   
Page 292 of 463

290SAFETY  
Trailer Sensors Detected Do Not Match Active 
Trailer
The “Trailer Sensors Detected Do Not Match 
Active Trailer” message will be displayed in the 
instrument cluster when the trailer sensors 
being received by the TTPMS module do not 
match the trailer sensors paired to the current 
trailer number selected. This message will be 
displayed when the sensors being received 
completely match the sensors paired to another 
trailer number configured in the TTPMS module.
To correct this condition, the correct trailer 
number must be selected in the radio  
Úpage 228.
Tire Fill Alert — If Equipped
This feature notifies the user when the placard 
tire pressure is attained while inflating or 
deflating the tire.
The customer may choose to disable or enable 
the Tire Fill Alert feature through use of the 
customer settings in the radio. NOTE:
Only one tire can be filled at a time when 
using the Tire Fill Alert system.
The Tire Fill Alert feature cannot be entered if 
an existing TPMS fault is set to “active” or if the 
system is in deactivation mode (if equipped).
The system will be activated when the TPMS 
receiver module detects a change in tire 
pressure. The ignition must be in the RUN 
mode, with the transmission in PARK (P).
NOTE:
It is not required to have the engine running to 
enter Tire Fill Alert mode.
The hazard lamps will come on to confirm the 
vehicle is in Tire Fill Alert mode.
If the hazard lamps do not come on while 
inflating the tire, the TPMS sensor may be in a 
null spot preventing the TPMS sensor signal 
from being received. In this case, the vehicle 
may need to be moved either forward or 
backward slightly to exit the null spot. When Tire Fill Alert mode is entered, the tire 
pressure display screen will be displayed in the 
instrument cluster.
Operation:The horn will chirp once to let the user know 
when to stop filling the tire, when it reaches 
recommended pressure.
The horn will chirp three times if the tire is 
overfilled and will continue to chirp every
five seconds if the user continues to inflate 
the tire.
The horn will chirp once again when enough 
air is let out to reach proper inflation level.
The horn will also chirp three times if the tire 
is then underinflated and will continue to 
chirp every five seconds if the user continues 
to deflate the tire.
21_DPF_OM_EN_USC_t.book  Page 290   
Page 293 of 463

SAFETY291
Selectable Tire Fill Alert (STFA) — If Equipped
The Selectable Tire Fill Alert (STFA) system is an 
optional feature that is included as part of the 
normal Tire Fill Alert system. The system is 
designed to allow the customer to select a 
pressure to inflate or deflate the vehicle's front 
and rear axle tires to and to provide feedback to 
the customer while inflating or deflating the 
vehicle's tires.
In the Selectable Tire Fill Alert application, 
which is located in the apps menu of the 
Uconnect system, the customer will be able to 
select a pressure setting for both the front and 
rear axle tire pressures by scrolling through a 
pressure range from XX to 15 psi in 1 psi 
increments for each axle setting. XX = the 
vehicle’s cold placard pressure values for the 
front and rear axles as shown on the vehicle 
placard pressure label.
The customer may also store the pressure 
values chosen for each axle in the radio as a 
preset pressure. The customer will be allowed 
to store up to two sets of preset values in the 
radio for the front and rear axle pressure values. Once the customer selects the tire pressures for 
the front and rear axles that they want to inflate 
or deflate to, they can begin inflating or 
deflating one tire at a time.
NOTE:
The STFA system will only support inflating or 
deflating one tire at a time.
The system will be activated when the TPMS 
receiver module detects a change in tire 
pressure. The ignition must be in the RUN 
mode, with the transmission in PARK (P).
The hazard lamps will come on to confirm the 
vehicle is in Tire Fill Alert mode.
If the hazard lamps do not come on while 
inflating or deflating the tire, the TPMS sensor 
may be in a null spot preventing the TPMS 
sensor signal from being received. In this case, 
the vehicle may need to be moved either 
forward or backward slightly to exit the null spot.
When Tire Fill Alert mode is entered, the tire 
pressure display screen will be displayed in the 
instrument cluster.
Operation:
The horn will chirp once when the selected 
pressure is reached to let the user know 
when to stop inflating or deflating the tire.
The horn will chirp three times if the tire is 
overinflated or over deflated and will 
continue to chirp every five seconds if the 
user continues to inflate or deflate the tire.
The horn will chirp once again when enough 
air is added or removed to reach proper 
selected pressure level.
Tire Pressure Information System (TPIS) 
3500/4500/5500 Series Trucks
Your vehicle may be equipped with a Tire 
Pressure Information System (TPIS).
The Tire Pressure Information System (TPIS) 
uses wireless technology with wheel rim 
mounted electronic sensors to transmit tire 
pressure levels. Sensors mounted to each 
wheel as part of the valve stem transmit tire 
pressure readings to the receiver module.
6
21_DPF_OM_EN_USC_t.book  Page 291   
Page 294 of 463

292SAFETY  
NOTE:
It is particularly important for you to check the 
tire pressure in all of the tires on your vehicle 
monthly and to maintain the proper pressure.
The TPIS consists of the following components:
Receiver module
Four TPMS sensors (Single Rear Wheel 
(SRW) applications)
Six TPMS sensors (Dual Rear Wheel (DRW) 
applications)
Pressure display in the instrument cluster
The TPIS system will display all four (Single Rear 
Wheel (SRW) applications) or six (Dual Rear 
Wheel (DRW) applications) tire pressure values 
in the instrument cluster display.
If a system fault is detected, the instrument 
cluster will display a "SERVICE TPM SYSTEM" 
message for a minimum of five seconds and 
then display dashes (- -) in place of the pressure 
value to indicate which sensor is not being 
received. If the ignition switch is cycled, this sequence will 
repeat, providing the system fault still exists. If 
the system fault no longer exists, the "SERVICE 
TPM SYSTEM" message will no longer be 
displayed, and a pressure value will display in 
place of the dashes. A system fault can occur 
due to any of the following:
Signal interference due to electronic devices 
or driving next to facilities emitting the same 
radio frequencies as the TPMS sensors.
Installing aftermarket window tinting that 
contains materials that may block radio wave 
signals.
Accumulation of snow or ice around the 
wheels or wheel housings.
Using tire chains on the vehicle.
Using wheels/tires not equipped with TPMS 
sensors.
OCCUPANT RESTRAINT SYSTEMS 
Some of the most important safety features in 
your vehicle are the restraint systems:
OCCUPANT RESTRAINT SYSTEMS 
F
EATURES 
Seat Belt Systems
Supplemental Restraint Systems (SRS) Air 
Bags
Child Restraints
Some of the safety features described in this 
section may be standard equipment on some 
models, or may be optional equipment on 
others. If you are not sure, ask an authorized 
dealer.
21_DPF_OM_EN_USC_t.book  Page 292   
Page 295 of 463

SAFETY293
IMPORTANT SAFETY PRECAUTIONS
Please pay close attention to the information in 
this section. It tells you how to use your restraint 
system properly, to keep you and your 
passengers as safe as possible.
Here are some simple steps you can take to 
minimize the risk of harm from a deploying air bag:
1. Children 12 years old and under should 
always ride buckled up in the rear seat of a 
vehicle with a rear seat.
2. A child who is not big enough to wear the  vehicle seat belt properly must be secured 
in the appropriate child restraint or 
belt-positioning booster seat in a rear 
seating position  Ú page 312.
3. If a child from 2 to 12 years old (not in a  rear-facing child restraint) must ride in the 
front passenger seat, move the seat as far 
back as possible and use the proper child 
restraint  Ú page 312.
4. Never allow children to slide the shoulder  belt behind them or under their arm. 5. You should read the instructions provided 
with your child restraint to make sure that 
you are using it properly.
6. All occupants should always wear their lap  and shoulder belts properly.
7. The driver and front passenger seats should  be moved back as far as practical to allow 
the front air bags room to inflate.
8. Do not lean against the door or window. If your vehicle has side air bags, and 
deployment occurs, the side air bags will 
inflate forcefully into the space between 
occupants and the door and occupants 
could be injured.
9. If the air bag system in this vehicle needs to  be modified to accommodate a disabled 
person, see  Ú page 445 for customer 
service contact information.
SEAT BELT SYSTEMS 
Buckle up even though you are an excellent 
driver, even on short trips. Someone on the road 
may be a poor driver and could cause a collision 
that includes you. This can happen far away 
from home or on your own street.
WARNING!
Never place a rear-facing child restraint in front 
of an air bag. A deploying passenger front air 
bag can cause death or serious injury to a child 
12 years or younger, including a child in a 
rear-facing child restraint.
Never install a rear-facing child restraint
in the front seat of a vehicle. Only use a 
rear-facing child restraint in the rear seat. 
If the vehicle does not have a rear seat, do 
not transport a rear-facing child restraint in 
that vehicle.
6
21_DPF_OM_EN_USC_t.book  Page 293   
Page 296 of 463

294SAFETY  
Research has shown that seat belts save lives, 
and they can reduce the seriousness of injuries 
in a collision. Some of the worst injuries happen 
when people are thrown from the vehicle. Seat 
belts reduce the possibility of ejection and the 
risk of injury caused by striking the inside of the 
vehicle. Everyone in a motor vehicle should be 
belted at all times.
Enhanced Seat Belt Use Reminder System 
(BeltAlert) 
Driver And Passenger BeltAlert — If Equipped
 BeltAlert is a feature intended to remind 
the driver and outboard front seat passenger 
(if equipped with outboard front passenger seat 
BeltAlert) to buckle their seat belts. The BeltAlert 
feature is active whenever the ignition switch is in 
the START or ON/RUN position.
Initial Indication
If the driver is unbuckled when the ignition switch 
is first in the START or ON/RUN position, a chime 
will signal for a few seconds. If the driver or 
outboard front seat passenger (if equipped with 
outboard front passenger seat BeltAlert) is 
unbuckled when the ignition switch is first in 
the START or ON/RUN position the Seat Belt  Reminder Light will turn on and remain on until 
both outboard front seat belts are buckled.
The outboard front passenger seat BeltAlert is 
not active when an outboard front passenger 
seat is unoccupied.
BeltAlert Warning Sequence
The BeltAlert warning sequence is activated 
when the vehicle is moving above a specified 
vehicle speed range and the driver or outboard 
front seat passenger is unbuckled (if equipped 
with outboard front passenger seat BeltAlert) 
(the outboard front passenger seat BeltAlert is 
not active when the outboard front passenger 
seat is unoccupied). The BeltAlert warning 
sequence starts by blinking the Seat Belt 
Reminder Light and sounding an intermittent 
chime. Once the BeltAlert warning sequence 
has completed, the Seat Belt Reminder Light 
will remain on until the seat belts are buckled. 
The BeltAlert warning sequence may repeat 
based on vehicle speed until the driver and 
occupied outboard front seat passenger seat 
belts are buckled. The driver should instruct all 
occupants to buckle their seat belts.
Change Of Status
If the driver or outboard front seat passenger
(if equipped with outboard front passenger seat 
BeltAlert) unbuckles their seat belt while the 
vehicle is traveling, the BeltAlert warning 
sequence will begin until the seat belts are 
buckled again.
The outboard front passenger seat BeltAlert is not 
active when the outboard front passenger seat is 
unoccupied. BeltAlert may be triggered when an 
animal or other items are placed on the outboard 
front passenger seat or when the seat is folded flat 
(if equipped). It is recommended that pets be 
restrained in the rear seat (if equipped) in pet 
harnesses or pet carriers that are secured by seat 
belts, and cargo is properly stowed.
BeltAlert can be activated or deactivated by an 
authorized dealer. FCA US LLC does not 
recommend deactivating BeltAlert.
NOTE:
If BeltAlert has been deactivated and the driver or 
outboard front seat passenger (if equipped with 
outboard front passenger seat BeltAlert) is 
unbuckled the Seat Belt Reminder Light will turn 
on and remain on until the driver and outboard 
front seat passenger seat belts are buckled.
21_DPF_OM_EN_USC_t.book  Page 294   
Page 297 of 463

SAFETY295
(Continued)
(Continued)
(Continued)
Lap/Shoulder Belts
All seating positions except the Crew Cab front 
center seating position have combination lap/
shoulder belts.
The seat belt webbing retractor will lock only 
during very sudden stops or collisions. This 
feature allows the shoulder part of the seat belt 
to move freely with you under normal conditions. 
However, in a collision the seat belt will lock and 
reduce your risk of striking the inside of the 
vehicle or being thrown out of the vehicle.
WARNING!
Relying on the air bags alone could lead to 
more severe injuries in a collision. The air 
bags work with your seat belt to restrain you 
properly. In some collisions, the air bags 
won’t deploy at all. Always wear your seat 
belt even though you have air bags.
In a collision, you and your passengers can 
suffer much greater injuries if you are not 
properly buckled up. You can strike the inte -
rior of your vehicle or other passengers, or 
you can be thrown out of the vehicle. Always 
be sure you and others in your vehicle are 
buckled up properly.
It is dangerous to ride in a cargo area, 
inside or outside of a vehicle. In a collision, 
people riding in these areas are more likely 
to be seriously injured or killed.
Do not allow people to ride in any area of 
your vehicle that is not equipped with seats 
and seat belts.
Be sure everyone in your vehicle is in a seat 
and using a seat belt properly. Occupants, 
including the driver, should always wear 
their seat belts whether or not an air bag is 
also provided at their seating position to 
minimize the risk of severe injury or death 
in the event of a crash.
Wearing your seat belt incorrectly could 
make your injuries in a collision much 
worse. You might suffer internal injuries, or 
you could even slide out of the seat belt. 
Follow these instructions to wear your seat 
belt safely and to keep your passengers 
safe, too.
WARNING!  (Continued)
Two people should never be belted into a 
single seat belt. People belted together can 
crash into one another in a collision, hurting 
one another badly. Never use a lap/
shoulder belt or a lap belt for more than one 
person, no matter what their size.
WARNING!
A lap belt worn too high can increase the 
risk of injury in a collision. The seat belt 
forces won’t be at the strong hip and pelvic 
bones, but across your abdomen. Always 
wear the lap part of your seat belt as low as 
possible and keep it snug.
A twisted seat belt may not protect you 
properly. In a collision, it could even cut into 
you. Be sure the seat belt is flat against 
your body, without twists. If you can’t 
straighten a seat belt in your vehicle, take it 
to an authorized dealer immediately and 
have it fixed.
WARNING! (Continued)
6
21_DPF_OM_EN_USC_t.book  Page 295   
Page 298 of 463

296SAFETY  
(Continued)
Lap/Shoulder Belt Operating Instructions 
1. Enter the vehicle and close the door. Sit back and adjust the seat.
2. The seat belt latch plate is above the back  of the front seat, and next to your arm in the 
rear seat (for vehicles equipped with a rear 
seat). Grab the latch plate and pull out the 
seat belt. Slide the latch plate up the 
webbing as far as necessary to allow the 
seat belt to go around your lap.
 Pulling Out The Latch Plate
3. When the seat belt is long enough to fit,  insert the latch plate into the buckle until 
you hear a “click.”
Inserting Latch Plate Into Buckle
A seat belt that is buckled into the wrong 
buckle will not protect you properly. The lap 
portion could ride too high on your body, 
possibly causing internal injuries. Always 
buckle your seat belt into the buckle 
nearest you.
A seat belt that is too loose will not protect 
you properly. In a sudden stop, you could 
move too far forward, increasing the possi -
bility of injury. Wear your seat belt snugly.
A seat belt that is worn under your arm is 
dangerous. Your body could strike the inside 
surfaces of the vehicle in a collision, 
increasing head and neck injury. A seat belt 
worn under the arm can cause internal inju -
ries. Ribs aren’t as strong as shoulder bones. 
Wear the seat belt over your shoulder so that 
your strongest bones will take the force in a 
collision.
A shoulder belt placed behind you will not 
protect you from injury during a collision. 
You are more likely to hit your head in a 
collision if you do not wear your shoulder 
belt. The lap and shoulder belt are meant to 
be used together.
WARNING!  (Continued)
A frayed or torn seat belt could rip apart in 
a collision and leave you with no protection. 
Inspect the seat belt system periodically, 
checking for cuts, frays, or loose parts. 
Damaged parts must be replaced immedi-
ately. Do not disassemble or modify the 
seat belt system. Seat belt assemblies 
must be replaced after a collision.
WARNING! (Continued)
21_DPF_OM_EN_USC_t.book  Page 296   
Page 299 of 463

SAFETY297
4. Position the lap belt so that it is snug and lies 
low across your hips, below your abdomen. 
To remove slack in the lap belt portion, pull 
up on the shoulder belt. To loosen the lap belt 
if it is too tight, tilt the latch plate and pull on 
the lap belt. A snug seat belt reduces the risk 
of sliding under the seat belt in a collision.
Positioning The Lap Belt
5. Position the shoulder belt across the  shoulder and chest with minimal, if any 
slack so that it is comfortable and not 
resting on your neck. The retractor will 
withdraw any slack in the shoulder belt.
 6. To release the seat belt, push the red button 
on the buckle. The seat belt will automatically 
retract to its stowed position. If necessary, 
slide the latch plate down the webbing to 
allow the seat belt to retract fully.
Lap/Shoulder Belt Untwisting Procedure  
Use the following procedure to untwist a twisted 
lap/shoulder belt.
1. Position the latch plate as close as possible to the anchor point.
2. At about 6 to 12 inches (15 to 30 cm) above  the latch plate, grab and twist the seat belt 
webbing 180 degrees to create a fold that 
begins immediately above the latch plate.
3. Slide the latch plate upward over the folded  webbing. The folded webbing must enter 
the slot at the top of the latch plate.
4. Continue to slide the latch plate up until it  clears the folded webbing and the seat belt 
is no longer twisted.
Adjustable Upper Shoulder Belt Anchorage 
In the driver and outboard front passenger 
seats, the top of the shoulder belt can be 
adjusted upward or downward to position the 
seat belt away from your neck. Push or squeeze 
the anchorage button to release the anchorage, 
and move it up or down to the position that 
serves you best.
Adjustable Anchorage
As a guide, if you are shorter than average, you 
will prefer the shoulder belt anchorage in a lower 
position, and if you are taller than average, you 
will prefer the shoulder belt anchorage in a higher 
position. After you release the anchorage button, 
try to move it up or down to make sure that it is 
locked in position.
6
21_DPF_OM_EN_USC_t.book  Page 297   
Page 300 of 463

298SAFETY  
NOTE:
The adjustable upper shoulder belt anchorage is 
equipped with an Easy Up feature. This feature 
allows the shoulder belt anchorage to be 
adjusted in the upward position without pushing 
or squeezing the release button. To verify the 
shoulder belt anchorage is latched, pull down -
ward on the shoulder belt anchorage until it is 
locked into position.
First Row Center Seat Belt Operating 
Instructions (Regular Cab Only)
The first row center seat belt (Regular Cab only) 
features a seat belt with a mini-latch plate and 
buckle, which allows the seat belt to detach 
from the lower anchor when the seat is folded. 
The latch plate and regular latch plate can then 
be stored out of the way in the seat for added 
convenience to open up utilization of the 
storage areas behind the front seats when the 
seat is not occupied.
1. Remove the mini-latch plate and regular  latch plate from its stowed position on the 
seat.
Connect Mini-Latch To Mini-Buckle Mini-Latch And Mini-Buckle Connected
2. Grasp the mini-latch plate and pull the seat  belt over the seat.
3. Route the shoulder belt to the inside of the  right head restraint.
4. When the seat belt is long enough to fit,  insert the mini-latch plate into the 
mini-buckle until you hear a “click.”
5. Sit back in seat. Slide the regular latch plate  up the webbing as far as necessary to allow 
the seat belt to go around your lap.
6. When the seat belt is long enough to fit,  insert the latch plate into the buckle until 
you hear a “click.”
WARNING!
Wearing your seat belt incorrectly could make 
your injuries in a collision much worse. You 
might suffer internal injuries, or you could even 
slide out of the seat belt. Follow these instruc -
tions to wear your seat belt safely and to keep 
your passengers safe, too.
Position the shoulder belt across the 
shoulder and chest with minimal, if any 
slack so that it is comfortable and not 
resting on your neck. The retractor will with -
draw any slack in the shoulder belt.
Misadjustment of the seat belt could 
reduce the effectiveness of the safety belt 
in a crash.
Always make all seat belt height adjust -
ments when the vehicle is stationary.
21_DPF_OM_EN_USC_t.book  Page 298